Owner's manual

MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
28 ______________________________________________________________________________________
MAX9792A
MAX9792B
LDO_EN
8
HP_INL
3
HP_INR
2
AVDD
7
LDO_OUT
6
HP_EN 22
BEEP 21
SPKR_EN
27
MONO
CLASS D
AMPLIFIER
CONTROL
CHARGE
PUMP
LDO BLOCK
TO HPVDD
TO CPVSS
0.1μF
0.1μF
PVDD
17, 26
4.5V TO 5.5V
28
19, 24 OUT+
OUT-
HPL
HPR
HPVDD
C1P
C1N
CPGND
18, 25
10
9
16
15
14
13
12
CPVSS
C2
1.0μF
20, 23
PGNDGND
1, 5
SPKR_IN
1.0μF
1.0μF
1.0μF1.0μF
4.5V TO 5.5V
4.5V TO 5.5V
2.7V TO 5.5V
TO CODEC
NOTE: LOGIC PINS CONFIGURED FOR:
LDO_EN = 1, LDO ENABLED
SPKR_EN = 0, SPEAKER AMPLIFIER ENABLED
HP_EN = 1, HEADPHONE AMPLIFIER ENABLED
C1
1.0μF
C3
10μF
RIN1
C
IN1
R
IN2
C
IN2
R
IN2
C
IN2
11
SENSE
TO HPVDD
4
C
COM
R
COM
μC BEEP INPUT
R
IN3
C
IN3
20kΩ
40.2kΩ
40.2kΩ
40.2kΩ
COM
MAX9792A Block Diagram